Will replacing hollow door with solid door on bathroom help soundproofing?

I have a hollow core door on my downstairs hall bathroom. When someone is using it, you can hear just about everything, which needless to say isn't the best thing. I had the walls insulated during construction to help make the bathroom more soundproof. My question is, would replacing the current hollow core door with a solid door help make the bathroom more soundproof? What else could I try? Thanks.